Sensory and sensorimotor gating in children with multiple complex developmental disorders (MCDD) and autism

Area of Science:

• Neuroscience
• Developmental Psychology
• Psychiatry

Background:

• Multiple Complex Developmental Disorder (MCDD) is an autism subtype linked to increased schizophrenia risk.
• Sensory gating deficits are common in schizophrenia and may serve as endophenotypic markers.

Purpose of the Study:

• To investigate sensory gating in children with MCDD compared to autism and controls.
• To determine if MCDD shares sensory filtering abnormalities with schizophrenia.

Main Methods:

• Assessed P50 suppression and prepulse inhibition (PPI) of the startle reflex.
• Included children with MCDD (n=14), autism (n=13), and healthy controls (n=12).
• Matched participants on age and IQ.

Main Results:

• All groups demonstrated robust P50 suppression and PPI.
• No significant group differences in sensory gating were observed.
• Absence of sensory filtering abnormalities in children with autism or MCDD.

Conclusions:

• The findings do not support a strong similarity between schizophrenia and MCDD based on sensory gating.
• Sensory gating deficits are not an endophenotypic marker for MCDD or autism in this cohort.
• Further research is needed to understand the relationship between MCDD and schizophrenia spectrum disorders.